#!/usr/bin/env perl

sub process_version {
   my ($version) = @_;
   my @vars;
   print "/* $version builtins */\n\n";

   my @files = <builtins/$version/*>;
   foreach $file (@files) {
      push(@vars, process_file($file));
   }

   print "static const char *functions_for_$version [] = {\n";
   foreach $var (@vars) {
      print "   $var,\n";
   }
   print "};\n\n"
}

sub process_file {
   my ($file) = @_;

   # Change from builtins/110/foo to builtins_110_foo
   my $var = $file; $var =~ s!/!_!g;

   print "static const char *$var = {\n";
   open SRC, "<", "$file" or die $!;
   while (<SRC>) {
      s/\\/\\\\/g;
      s/\"/\\\"/g;
      s/\n/\\n/g;
      print "   \"$_\"\n";
   }
   print "};\n\n";
   close SRC or die $!;
   return $var;
}

print << 'EOF';
/* DO NOT MODIFY - automatically generated by generate_builtins.pl */
/*
 * Copyright © 2010 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#include <stdio.h>
#include "glsl_parser_extras.h"
#include "ir_reader.h"
#include "program.h"

extern "C" struct gl_shader *
_mesa_new_shader(GLcontext *ctx, GLuint name, GLenum type);

gl_shader *
read_builtins(GLenum target, const char **functions, unsigned count)
{
   gl_shader *sh = _mesa_new_shader(NULL, 0, target);
   struct _mesa_glsl_parse_state *st =
      new(sh) _mesa_glsl_parse_state(NULL, target, sh);

   st->language_version = 130;
   st->ARB_texture_rectangle_enable = true;
   st->EXT_texture_array_enable = true;
   _mesa_glsl_initialize_types(st);

   sh->ir = new(sh) exec_list;
   sh->symbols = st->symbols;

   for (unsigned i = 0; i < count; i++) {
      _mesa_glsl_read_ir(st, sh->ir, functions[i]);

      if (st->error) {
	 printf("error reading builtin: %.35s ...\n", functions[i]);
	 delete st;
	 talloc_free(sh);
         return NULL;
      }
   }

   reparent_ir(sh->ir, sh);
   delete st;

   return sh;
}

EOF

@versions = sort(<builtins/[1-9A-Z]*>);
foreach $version (@versions) {
   $version =~ s!builtins/!!g;
   process_version($version);
}

print << 'EOF';
#ifndef Elements
#define Elements(x) (sizeof(x)/sizeof(*(x)))
#endif

void *builtin_mem_ctx = NULL;

void
_mesa_glsl_release_functions(void)
{
    talloc_free(builtin_mem_ctx);
}

void
_mesa_glsl_initialize_functions(exec_list *instructions,
			        struct _mesa_glsl_parse_state *state)
{
   if (builtin_mem_ctx == NULL)
      builtin_mem_ctx = talloc_init("GLSL built-in functions");

   state->num_builtins_to_link = 0;
EOF

foreach $version_xs (@versions) {
   $check = "";
   if ($version_xs =~ /_vs/) {
      $check = "state->target == vertex_shader && ";
   } elsif ($version_xs =~ /_fs/) {
      $check = "state->target == fragment_shader && ";
   }
   $version = $version_xs;
   $version =~ s/_[vf]s//g;

   if ($version =~ /^[1-9][0-9][0-9]/) {
      $check = "${check}state->language_version >= $version";
   } else {
      # Not a version...an extension name
      $check = "${check}state->${version}_enable";
   }
   print "   if ($check) {\n";
   print "      static gl_shader *sh = NULL;\n";
   print "\n";
   print "      if (sh == NULL) {\n";
   print "	 sh = read_builtins(GL_VERTEX_SHADER, functions_for_$version_xs,\n";
   print "			    Elements(functions_for_$version_xs));\n";
   print "	 talloc_steal(builtin_mem_ctx, sh);\n";
   print "      }\n";
   print "\n";
   print "      import_prototypes(sh->ir, instructions, state->symbols, state);\n";
   print "      state->builtins_to_link[state->num_builtins_to_link] = sh;\n";
   print "      state->num_builtins_to_link++;\n";
   print "   }\n";
   print "\n";
}

print "}\n";